Portable speaker



FIG. 1 is a front perspective view of a portable speaker, showing my new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left-side elevational view thereof, the right-side elevational view being a mirror image thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken line portions of FIG. 4 are included to show unclaimed subject matter only and form no part of the claimed design. 

CLAIM I claim the ornamental design for a portable speaker, as shown and described. 